just based on injury history of players Morant is the best pick

I think I would strongly consider retirement.

consider retirement? both of them are still young at 23-24, there is still a lot of money to be earned. Keep milking the cow until no more team owner or manager would want them. For Ja Morant, he needs to grow up and act more maturely. For Zion, he needs to keep in shape and no more dunking anymore to save his knees and his back.